In Blender 2.8, can I reset 'My View' to the initial perspective used when a brand new project file is opened?
Just add a new camera and align it to view.
Then you can always switch to it by clicking the green camera icon.


Add a new camera, and make it active by clicking the green camera icon
Align it to view through View > Align View > Align Active Camera to View
Switch between cameras by clicking the green camera icons